“Select Game Object” window opens when pressing Enter key on the selected greyed out "From" field in WorldTime GameObject

Reproduction steps:
1. Create a new project
2. Install Entities package (Window > Package Management > Package Manager)
3. Select WorldTime GameObject in the Hierarchy
4. Select greyed out "From" field in the Inspector
5. Press Enter key
6. Observe the Editor

Actual result: “Select Game Object” window opens
Expected result: No additional windows open when fields are greyed out

Reproducible with: 6.5.0 (6000.5.1f1), 6.6.0 (6000.6.0a7)
Couldn’t reproduce with: 1.13.2 (6000.4.12f1) (No WorldTime GameObject)

Reproduced on: Windows 11, macOS Tahoe 26.5 (M4)